unfortunately the 4K approach is not helping. i did a careful comparison. i also tried 4K with 200% screen percentage.
for now the best anti aliasing results is to use temporal AA + 1080p + 200% screen percentage, but unfortunately many textures somehow switched to very low resolution ( blur out ) and i think actors are forced to use lowest LOD. i am a beginner to ue4 and do not know what to do.
also a screen message say ( texture streaming over 344mb ).